import { v4 as uuidv4 } from 'uuid';
// 要生成一个随机字符串，且每次执行不能发生变化，游客身份持久存储
export const getUUID = ()=>{
    // 先查看本地有没有
    let uuid_token = localStorage.getItem('UUIDTOKEN')
    // 如果没有则生成
    if(!uuid_token){
        uuid_token = uuidv4()
        localStorage.setItem('UUIDTOKEN',uuid_token)
    }
    return uuid_token
}